53401555 has 4 divisors (see below), whose sum is σ = 64081872. Its totient is φ = 42721240.

The previous prime is 53401553. The next prime is 53401559. The reversal of 53401555 is 55510435.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55510435 = 5 ⋅11102087.

It is not a de Polignac number, because 53401555 - 2¹ = 53401553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53401553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5340151 + ... + 5340160.

It is an arithmetic number, because the mean of its divisors is an integer number (16020468).

Almost surely, 2^53401555 is an apocalyptic number.

53401555 is a deficient number, since it is larger than the sum of its proper divisors (10680317).

53401555 is a wasteful number, since it uses less digits than its factorization.

53401555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10680316.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 53401555 is about 7307.6367588982. The cubic root of 53401555 is about 376.5748407829.

It can be divided in two parts, 53401 and 555, that added together give a triangular number (53956 = T₃₂₈).

The spelling of 53401555 in words is "fifty-three million, four hundred one thousand, five hundred fifty-five".